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lora16 [44]
2 years ago
10

Write -7/10 as a decimal.

Mathematics
1 answer:
RoseWind [281]2 years ago
3 0
-0.7 is the answer please mark me brainliest
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g Disco Fever is randomly found in one half of one percent of the general population. Testing a swatch of clothing for the prese
Marizza181 [45]

Answer:

The probability that the result is positive is P=0.04475=4.475%.

Step-by-step explanation:

We have the events:

D: disease present

ND: disease not present

P: test positive

F: test false

Then, the information we have is:

P(D)=0.005

P(P | D)=0.99

P(P | ND)=0.04

The total amount of positive test are the sum of the positive when the disease is present and the false positives (positive tests when the disease is not present).

P(P)=P(P | D)*P(D)+P(P | ND)*(1-P(D))\\\\P(P)=0.99*0.005+0.04*0.995\\\\P(P)=0.00495+0.0398=0.04475

The probability that the result is positive is P=0.04475.

5 0
3 years ago
How to divide 83.7 by 0.03
Mandarinka [93]
The answer would be 2790
6 0
3 years ago
Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was
andrezito [222]

Answer:

The 92% confidence interval for the true proportion of customers who click on ads on their smartphones is (0.3336, 0.5064).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 100, p = 0.42

92% confidence level

So \alpha = 0.08, z is the value of Z that has a pvalue of 1 - \frac{0.08}{2} = 0.96, so Z = 1.75.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 - 1.75\sqrt{\frac{0.42*0.58}{100}} = 0.3336

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.42 - 1.75\sqrt{\frac{0.42*0.58}{100}} = 0.5064

The 92% confidence interval for the true proportion of customers who click on ads on their smartphones is (0.3336, 0.5064).

4 0
3 years ago
A rectangle is formed by two congruent right triangles. The area of each triangle is 6 in2. If each side of the rectangle is a w
viktelen [127]
Area of the rectangle is 2*6=12 in^2
12 could be = 1*12  or 2*6   or 3*4 
P could be 2*(1+12)=2*13=26 
                  2*(2+6)=2*8=16
                   2*(3+4)=2*7=14

the answer is 24 in  (c)
4 0
2 years ago
For the following geometric sequence find the recursive formula: {-1, 3, -9, ...}.
vredina [299]
First term (a1) is -1

recursive formula goes like this

a_n is the nth term
a_{n-1} is the term before that

we normally have a_n=f(a_{n-1})

we see each term is multipying by -3 to get next one


so that would be
a_n=-3*a_{n-1} where a1=-1


the 3rd option is correct except that it is the explicit formula

so answer is 2nd one
3 0
2 years ago
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